Charles whitfield



(No Model.) 7

2 0'. WHITFIELD. MEGHANISMFOR OPERATING PLUIVGJEPRS. No. 522,279.PatentedJuly 3, 1894.

ITED STATES PATENT MECHANISM FOR OPERATING PLUNGERS..

SPECIFICATION forming part of Letters Patent No. 522,279, dated July 3,1894. I Application filedMaroh 14, 1893. Serial No. 465.945. (No model.)Patentedin England July 31, 1891,11'0. 12,964.

To all whom it may-concern:

Be it known that I, CHARLES WHITFIELD, a subject of the Queen of GreatBritain and Ireland, and a resident of Kettering, in the county ofNorthampton, England, have invented certain new and useful Improvementsin Mechanism for Operating Plungers, also applicable to Heel Buildingand Attaching Machines, (for which I have obtained Letters Patent inGreat Britain, No. 12,964, bearing date July 31, 1891,) of which thefollowing is a specification. I

This invention consists of a machine for punching leather and similarsubstances, characterized by an eccentric or crank mounted upon arevolving shaft in combination with a sliding plunger carrying thepunches and connected together by a special form of link, which underthe influence of a spring or its equivalent assumes a folded positionand nullifies the thrust of the eccentric on "centric upon the plungerand so causes the plunger to descend and effect the punching operation.The operation of straightening out the link may be done at will,facility being afforded for this purpose.

This improved construction of machine with suitable modifications may beadapted to heel building and attaching machines.

On the accompanying drawings Figures 1 and 2 are front views of myimproved punching machine (partly in section) showing the idle andactive positions of the link. Fig. 3 is a sectional side elevation of aheel building machine with my improvements applied thereto. Fig. 4 is asectional front view of the eccentric and link.

In accordance with my invention A is the horizontal shaft (seen dotted)driven by toothed gearing B andsupported in bearing 0 rising from thebed or base D.

E is the eccentric formed upon the end of the shaft A and surrounded bythe sleeve F having a link or finger G connected by my improved link Kto the plunger H as illustrated. This link is provided with a leverhandle L or other equivalent device for bringing it in a line with theplunger H. The

plunger is fitted with punches as illustrated and works in the verticalslide or cylinder I, the front half of which is shown removed.

M is the spring situated in a recess formed in the plunger which pushesthe point N against the link and causes the same to fold as illustratedin Fig. 1.

The action of my improved machine is as follows: Continuous revolvingmotion being imparted to the horizontal shaft, and the leather to bepunched being placed beneath the plunger at O, the link K is pulled byhandle L into line as illustrated in Fig. 2. The thrust of the eccentricis then imparted to the plunger, causing it to descend and so punch theleather. As soon as the punching operation is completed the handle L maybe let go, the link K simultaneously folding outward and again assumingthe position shown in Fig. 1, the shaft A continuing to revolve withouthaving any efiect on the plunger.

ates in an upward direction for driving thev nails into the heel formedin the mold T and for attaching such heel to the'boot. The link isopened out by means of the handle U or an equivalent foot lever.

U is the block either employed for compressing the heel in course ofbuilding or for holding the boot against the heel during the process ofattaching, being forced and held I in what manner the same is to beperformed,

I declare that what I claim, and desire to secure by Letters Patent, is

1. In mechanism for operating plnngers, the combination with a plunger,of a shaft, an eccentric on the shaft, a sleeve on the cocentric, a linkpivotally connected with the plunger and with the sleeve, and meansadapted to act upon said link for throwing the same into and out ofoperative position with respect to the eccentric, substantially asdescribed.

2. In mechanism for operating plungers, the combination with a plunger,of a shaft,

